Carding flat



@CL Z6, 93?.` J, APLAT-r 2,097,254

CARD ING FLAT Filed Novfzs, 1955 W7 f@ mmm f/ INVENTOR:

JOHN PLA-VT AT TORN fY Cil Patented Oct. 26, 1937 UNITED STATES PATENT OFFiC-E In Great Britain 2 Claims.

This invention relates to carding flats. Heretofore carding flats have been constructed of cast iron with the result that they are very easily breakable and breakages frequently occur in transit and in some instances: during the operation of a carding machine, due for example to knotted cotton being drawn into the machine. The chief object of the present invention is to provide an improved construction of carding flat which is very durable and which for ordinary purposes is practically unbreakable and is not likely to be damaged by bending or deflection or in any way that would result in. the carding machine being damaged.

According to one feature of the present invention, the carding flat is constructed of sheet material having a sectional form that offers great resistance to deflection or bending and at the same time is not likely to be fractured by ordinary usage or by rough handling in transit, tting or the like. The at may therefore be made of a ductile metal such as sheet steel or iron, preferably cold rolled mild steel, and this may in one example be shaped with parts that are to form the seating or seatings for the flat top that merges into a U-shaped extension of somewhat parabolic formation so that in crosssection the fiat comprises the U-shaped or parabolic extension with the seatings at the free Yextremities to receive the flat top. The flat top may be secured on the seatings in any appropriate manner, for example by turned-over edges of the seatings that are clamped along the edges of the flat top. Alternatively, the flat top may be provided with lateral strips that can be clamped on to the said seating.

According to a further feature of the invention, a strip may be riveted or otherwise secured to the said seatings and the fiat top may be clamped on to the strip, for example by lateral pieces that embrace the strip and the seatings. The flat top may be constituted by a series of toothed strips which are secured together in a channel or by any appropriate means to provide a flat or topi as covered by United States Patent No. 1,709,038. In some instances a flat might be constituted by providing a series of toothed strips in a sheet metal section similar to that hereinbefore referred to and securing the several strips in position in any appropriate manner. Alternatively, the ordinary fiat having resilient or bent teeth set in a flexible or cloth foundation may be supported in a sheet metal flat or section as hereinbefore described; in. this case it may be desirable to provide a seating plate ex- November 23, 1934 (Cl. lll- 113) tending across the aforesaid seatings or ledges for the purpose of supporting the flexible top.

According toa further feature of the invention, improved means are provided for supporting the flat at its-ends.` The said means are preferably such as to avoid the use of cast iron and an extension may be secured to the flat in any appropriate manner which may be covered or fitted with a renewable seating or bearing preferably of alloy steel which is hardened and tempered and so shaped as to provide the heel and toe seatings on the fiat. When this feature is applied to a flat of the: formation above described, a metal plug or insertion may be riveted, welded or otherwise secured within each end of the parabolic or U-shaped section. of the flat, This plug or insertion may be formed with an extension that is provided` or tted with the renewable seating or covering of sheet alloy steel hardened and tempered as aforesaid, this renewable seating or covering being constituted by a suitably shaped strip having channel shaped ends or sides to fit over the extension which is suitably curved so as to be slightly concave, preferably on both its upper and lower surfaces. The renewable strip is curved on one surface to conform with and fit against the upper curved surface of Vthe extension and the extremities or edges of the seating are disposed at the lower surface of the extension and form the heel and toe seatings for the flat. In the event of it being necessary to replace the heel and toe seatings, the aforesaid sheet metal fitting is withdrawn in any appropriate manner from the extension and it is replaced by another and similar seating strip which is pressed in position. the modification employing a strip between the U-shaped base and the fiat top the strip may be extended beyond the ends of the flat and may be providedwith renewable heel and toe seatings o-n one side and bearings or seatings on the other side for engaging the stari wheel or the like over which the flat is carried during its operation. According to the present invention the flat is considerably strengthened by the section and formation hereinbefore referred to so that it is particularly suitable for use in places Where new flats are not readily obtainble or cannot be quickly or easily repaired. Further, the provision of the renewable seatings also avoids re-milling as is necessary with the usual form of seating or bearing which is provided on ats.

In order that the invention may be clearly understood and readily carried into effect, the

same will now be more fully described with reference to the accompanying drawing, in which:-

Figure 1 is an end view of one form of the carding fiat according to this invention.

Figure 2 is a cross-sectional View of another form of the carding fiat showing a modified method of retaining the at top in position.

Figure 3 is a side view of one end of the carding fiat partly in section showing one arrangement of the renewable seatings or bearings'. ,1 i

Figure 4 is an end View of the fiat shown in Figure 3.

Figure 5 is a cross-sectional View of one form of the carding flat having a strip or platelinterposed between the flat top and the base or foundation.

Figure 6 is a side view of the modified carding at shown in Figure 5.

Figure 7 is an end view of the form shownin Figures 5 and 6 illustrating in particular the re# newable seatings.

As shown in Figure l the flat comprises av toothed' top constituted by arseries of toothed strips IIJ held within a channel-shaped strip or support I I. This flat top is secured upona hollow base or foundation I2, preferably made of a ductile metal such as sheet iron or steel, preferably cold rolled steel of about 16 gauge. This base or foundation I 2 is of-U-shape or somewhat parabolic formation in cross-section and its upper part is provided with ledges or seatings I3 and flanges I4 which can be clamped on to the flatV top when the latter is supported on the seatings I3. In the construction shown in Figure 2, the foundation or base I2 is formed with seatings I3 upon which the flat top rests, but in this example the fiat top is secured in position by means of laterally disposed strips of metal I5 which are inserted through slits in the base of the support I I that carries the toothed strips I so as to project laterally, the laterally projecting portions being bent over to secure or clamp the flat top on the seatings I3 of the foundation I2. In the construction illustrated in Figure 3, kone arrangement of providing the renewable seatings or bearings isillustrated. In this case the flat top is secured in position in any appropriate manner, for example by the method shown in Figure 2 and within the end of the U-shaped foundation or base I2, a plug I6 is inserted, the plug being secured in position by rivets or other means and being formed with a projecting end portion II that constitutes a support for a renewable seating or bearing I8, preferably of sheet metal alloy,

the seating being secured in position by means of rivets as shown at I9 in Figures 3 and 4. The surface of the renewable seating is suitably curved so as to be slightly concave, its edges being so disposed as to form the heel and toe bearings or seatings for the fiat. In the examples illustrated in Figures 5, 6, and 7, a U-shaped base or foundation I2 is formed with seatings or ledges I3 as aforesaid. Interposed between the flat top and the base or foundation, however, is a steel strip 2D which is secured to the seatings I3, for example Y by rivets 2 I, and constitutes the surface on which the flat top is secured. By the provision of the Vstrip 20 which is riveted or otherwise secured to the U-shaped base or foundation, the latter becomes tubular, thereby imparting considerable strength and rigidity to the at. The fiat top is secured on the strip or plate 20 by means of laterallyextending strips I extending through slots in the top as in Fig. 2 and embracing the seatings l3 and the strip or plate 2U. The said strip or plate 20 projects beyond the ends of the flat and one end is shown in Figure 6. In this case, the projecting end of the strip 20 is adapted to receive renewable seatings 22 and 23 which are secured in position by means of rivets 24, these seatings being suitably shaped so that one 22 constitutes the heel and toe bearing for the flat, whilst the other 23 is adapted to pass around the star wheel or the like during the travel of the at in the carding machine. In this case also the ends'of the U-shaped foundation or base may be closed by a plug 25 which in this example may form part of the aforesaid strip 20, the said plug also being riveted in the U-shaped base if desired.

What I claim and desire' to secure by Letters Patent of the United States is:-

1. A carding fiat comprising a toothed top constituted by assembled toothed strips mounted in a support havingslits, metal pieces inserted in said slits to form lateral extensions, and a foundation of hollow formation having seatings to receive the said top, the said lateral extensions being adapted to be clamped on to the said seatings.

2. A carding fiat comprising a toothed top constituted by an assembled toothed strip in a channel shaped support, a hollow foundation for carrying said top, said support being slit to receive metal pieces that form lateral extensions for securing the top to the foundation, and projections on the foundation carrying renewable seatings.

J OHN PLATT. 

